US3937175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsed spray of fluids
Assignee: CNA Holdings LLC
•
Filing: 1973-12-26
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Granted: 1976-02-10
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Expires: 1993-12-26
Abstract
Abstract Method and apparatus for automatically spraying a liquid on the surface of a moving object, particularly developer, rinse and gumming liquids on an exposed, photosensitive printing plate, in which the liquid is continuously supplied to a distribution line at a predetermined pressure, and simultaneously with the supply of liquid, the object is transported past a spray means connected to the distribution line, an impinging spray of the liquid is alternately applied to the object for a first predetermined period and the application is interrupted for a second predetermined period and the cycle is repeated a plurality of times during the passage of the object past the spray means, as by a solenoid valve mounted in the distribution line and a timer connected to the solenoid valve to open and close the same.
Inventors
- 👤 Ellwood J. Horner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:42
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/3042; B; B05; B05B; B05B12/00; B05B12/02; B05B12/06; G03D; G03D15/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
180 words
Apparatus for automatically spraying a liquid on the surface of a moving object comprising, transport means for transporting said object, spray means mounted adjacent the path of travel of said object for spraying an impinging spray of said liquid onto a predetermined area of said surface of said object as said object passes said spray means, distribution line means operatively coupled to said spray means, supply means operatively coupled to said distribution line for continuously supplying said liquid to said distribution line and pulsing means operatively coupled to said distribution line for repetitively and alternately passing said liquid through said spray means for a sufficiently short, first, predetermined period of time to maintain an essentially constant, predetermined pressure on said liquid issuing through said spray means and interrupting the passage of said liquid through said means for a sufficiently long, second, predetermined period of time to build up said predetermined pressure and for repetitively passing said liquid through said spray means at a rate sufficient to deposit a continuous coating of said liquid on said predetermined area of said object.
Claim 2
Dependent Claim
180 words
Apparatus for automatically spraying a liquid on the surface of a moving object comprising, transport means for transporting said object, spray means mounted adjacent the path of travel of said object for spraying an impinging spray of said liquid onto a predetermined area of said surface of said object as said object passes said spray means, distribution line means operatively coupled to said spray means, supply means operatively coupled to said distribution line for continuously supplying said liquid to said distribution line and pulsing means operatively coupled to said distribution line for repetitively and alternately passing said liquid through said spray means for a sufficiently short, first, predetermined period of time to maintain an essentially constant, predetermined pressure on said liquid issuing through said spray means and interrupting the passage of said liquid through said means for a sufficiently long, second, predetermined period of time to build up said predetermined pressure and for repetitively passing said liquid through said spray means at a rate sufficient to deposit a continuous coating of said liquid on said predetermined area of said object.
Claim 3
Dependent Claim
18 words
Apparatus in accordance with claim 1 wherein the apparatus is apparatus for processing an exposed, photosensitive printing plate.
Claim 4
Dependent Claim
14 words
Apparatus in accordance with claim 2 wherein the printing plate is a lithographic plate.
Claim 5
Dependent Claim
15 words
Apparatus in accordance with claim 2 wherein the printing plate is a photopolymer letterpress plate.
Claim 6
Dependent Claim
24 words
Apparatus in accordance with claim 1 wherein the object is a flat sheet material and the transport means is a pair of feed rollers.
Claim 7
Dependent Claim
13 words
Apparatus in accordance with claim 2 wherein the liquid is a developer liquid.
Claim 8
Dependent Claim
13 words
Apparatus in accordance with claim 2 wherein the liquid is a rinse liquid.
Claim 9
Dependent Claim
13 words
Apparatus in accordance with claim 2 wherein the liquid is a gumming liquid.
Claim 10
Dependent Claim
20 words
Apparatus in accordance with claim 1 wherein the spray means is a plurality of spray heads spaced from one another.
Claim 11
Dependent Claim
43 words
Apparatus in accordance with claim 9 wherein the object is a flat sheet material and the spray heads are spaced in a single row across the width of said sheet transverse in the direction of travel of said sheet past said spray heads.
Claim 12
Dependent Claim
14 words
Apparatus in accordance with claim 1 wherein the supply means is a pump means.
Claim 13
Dependent Claim
21 words
Apparatus in accordance with claim 1 wherein the pulsing means is an automatically operated valve means mounted in the distribution line.
Claim 14
Dependent Claim
16 words
Apparatus in accordance with claim 12 wherein the valve means is a solenoid operated valve means.
Claim 15
Dependent Claim
20 words
Apparatus in accordance with claim 12 wherein the pulsing means includes automatic timing means operatively coupled to the valve means.
Claim 16
Dependent Claim
17 words
Apparatus in accordance with claim 1 wherein the first and second predetermined periods are equal in time.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |